<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>02-JavaScript的注释和页面输出</title>
    <script>
        // 单行注释
        /*
            多行注释
         */
        document.write("你好，js");
        document.write("<h1>标题一</h1>")
    </script>
</head>
<body>

</body>
</html>